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Tandem Photovoltaic Cells with Amorphous Silicon Cells and Organic Photovoltaic Cells

Published online by Cambridge University Press:  25 March 2011

Taehee Kim ,
Jun Hong Jeon ,
Seung Hee Han ,
Doh-Kwon Lee  and
Kyungkon Kim
Taehee Kim
Affiliation:
Solar Cell Center, Energy Division, Korea Institute of Science and Technology, P.O. Box 131,Cheongryang, Seoul 136-791, Korea
Jun Hong Jeon
Affiliation:
Solar Cell Center, Energy Division, Korea Institute of Science and Technology, P.O. Box 131,Cheongryang, Seoul 136-791, Korea
Seung Hee Han
Affiliation:
Solar Cell Center, Energy Division, Korea Institute of Science and Technology, P.O. Box 131,Cheongryang, Seoul 136-791, Korea
Doh-Kwon Lee
Affiliation:
Solar Cell Center, Energy Division, Korea Institute of Science and Technology, P.O. Box 131,Cheongryang, Seoul 136-791, Korea
Kyungkon Kim
Affiliation:
Solar Cell Center, Energy Division, Korea Institute of Science and Technology, P.O. Box 131,Cheongryang, Seoul 136-791, Korea
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Abstract

We demonstrate series-connected tandem photovoltaic cells consisting of hydrogenated amorphous silicon (a-Si:H) solar cells and polymer-based organic photovoltaic (OPV) cells. One of the limiting factors of a-Si:H solar cells is their narrow absorption spectrum as compared with that of crystalline silicon solar cells. In order to overcome this limitation, we fabricated a hybrid tandem solar cell by employing a solution-processed OPV subcell based on a low bandgap semiconducting polymer onto the a-Si:H subcell. It was found that the interfacial property of the hole transporting intermediate layer between the subcells strongly affects the photovoltaic property of the tandem cells. By using MoO3 as an efficient hole transporting intermediate layer instead of the conventional conducting polymer, we obtained the power conversion efficiency of 1.84% and the open-circuit voltage (VOC) of 1.50 V which corresponds closely to the sum of the VOCs of the subcells.

Keywords

photovoltaicpolymerSi
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1288: Symposium G – Novel Fabrication Methods for Electronic Devices , 2011 , mrsf10-1288-g06-28
Copyright
Copyright © Materials Research Society 2011

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